補充:
yeah, its not bh5 or ch5. the homepage of OCC has a link to a 3200XL review and in that review they take off the heatspreader to show that Samsung chips rated at 4ns were being used:

"Once I removed the heat spreaders I found one of the newest Samsung IC's on the market for high speed memory modules -- Samsung TCCD Revision F's. The full part number was found to be K4H560838F-TCCD. For those of you who don't know, these IC's from Samsung are in the TSOP form factor and are rated by samsung at 4ns. Actually, the Samsung TCCD IC's come rated at 500MHz, but with relaxed timings of 3-4-4. After removing the heat spreader I found some pretty great IC's in terms of overclocking. These 400MHz modules are using IC's that Samsung rates at 500Mhz. This should make overclocking very interesting."




Specification Feature

Decoding Samsung K4H560838F-TCCD

K4 Samsung

H DDR SDRAM

56 256M 8K Refresh

08 organization = 8

3 4 Banks

8 Interface = SSTL_2 2.5V

F Generation #7

T TSOP Package

C Normal Temperature Range

CD 4.0ns @ DDR500 3-4-4